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Techno: Jurnal Penelitian
Published by Universitas Khairun
ISSN : 1978610X     EISSN : 25807129     DOI : -
Core Subject : Science, Agriculture, Engineering,
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Civil Engineering, Building, Construction & Architecture
TECHNO: Jurnal Penelitian diterbitkan oleh Lembaga Penelitian dan Pengabdian Masyarakat (LPPM) Universitas Khairun, dua kali terbit dalam setahun dengan jumlah artikel dalam sekali terbit sebanyak 8 tulisan.
Arjuna Subject : -
Articles 169 Documents
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Analysis of Rolling Motion to Obtain Moments of Inertia in a Compound Objects With Video-based Laboratory (VBL) Febri Rismaningsih; Fita Widiyatun; Ria Asep Sumarni
Techno: Jurnal Penelitian Vol 11, No 1 (2022): Techno Jurnal Penelitian
Publisher : Universitas Khairun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33387/tjp.v11i1.3412

Abstract

This study aims to get the moment of inertia in compound objects by comparing the calculation results with the help of Video-based Laboratory, namely Tracker software. The variable used is the difference in the number of balls to fill the cavity on the cylinder which is a hollow cylinder containing 1 solid ball, a hollow cylinder containing 2 solid balls then a hollow cylinder containing 3 solid balls. The balls have the same radius. Based on the results of the comparison of the moment of inertia between the value obtained with the help of the tracker and the value of the integral calculation result obtained results on a hollow cylinder containing one ball, there is a difference in value comparison of about ±0,070 x10-3 kg m2, on hollow cylinders containing two balls about ± 0,041 x10-3 kg m2, and on hollow cylinders containing three balls, there is a difference of ± 0,002 x10-3 kg m2. The biggest difference between the three data is when the hollow cylinder is filled with only one ball, but when it is filled with three balls, the value of the moment of inertia is almost the same or the difference is getting smaller. So in this study, it can be concluded that the more balls in a hollow cylinder, the closer the value of the moment of inertia. In addition, the greater the mass of objects, the greater the moment of inertia produced.
Osmotik Word Level Teredo navalis Linnaeus 1758 in the Mangrove Root Habitat in East Halmahera, Indonesia Yumima Sinyo; Suparman Suparman; Asmar Hi Daud; Tamrin Robo
Techno: Jurnal Penelitian Vol 11, No 1 (2022): Techno Jurnal Penelitian
Publisher : Universitas Khairun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33387/tjp.v11i1.4185

Abstract

This study aims to analyze the osmotic work level and pattern of osmoregulation at mollusc Teredo navalis Linnaeus 1758 in mangrove root habitats from different salinities. Case study was performed with the purposive sampling method. The research data were analyzed descriptively and quantitatively. The sampling technique is based on tidal conditions of seawater. Two locations was designated, namely station I and II in the north and the south respectively. Teredo navalis samples were taken from 2 types of mangrove roots. Analysis of the level of osmotic work using Automatic Micro Osmometer Roebling Type 13/13 DR. Salinity was measured using a refractometer. The results showed that the osmotic level of Teredo navalis in the root habitat of Rhizophora sp. and Avicennia sp. at high and low tide conditions varied, specifically 523 mOsm/l H2O, 123 mOsm/l H2O, and 32 mOsm/l H2O. This varying level of osmotic action results in three patterns of osmoregulation, viz. hyperosmotic, hypoosmotic, and isosmotic. The highest salinity was found in Avicennia sp. mangrove at station II and the lowest in Rhizophora sp. at low tide at station II, with the value was 31‰ and 10‰ respectively. Differences in salinity determine the osmoregulation pattern of Teredo navalis L in different habitats.
Modified Aluminium Tube Profile to Enhance the Performance of Impact Energy Absorption Witono Hardi; Tri Suyono; Rudi Hartono
Techno: Jurnal Penelitian Vol 11, No 1 (2022): Techno Jurnal Penelitian
Publisher : Universitas Khairun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33387/tjp.v11i1.4044

Abstract

The use of thin-walled structures as impact energy absorbers are well known. The thin aluminum cylinder tube is a good impact energy absorber. However, the energy-absorbing design must also have sufficient toughness. In this research, we made modifications to improve the performance of the thin aluminum tube. The thin aluminum cylinder's modification is prepared by adding four grooves along the wall in the axial direction. Numerical modeling was carried out using the finite element method. The impact test is carried out by  applying a high  speed of 50 m/s  to a hammer that hits the axial direction's specimen. Explicit dynamic analysis is used in this modeling. The reaction force is obtained by measuring fixed support at the end of the tube. The total energy as a function of time is received in this simulation. The explicit dynamic simulation results show that the toughness of the modified specimens increased compared to the original model. The amount of energy per unit time at the start of the collision appears to be higher. Likewise, the total deformation in the modified specimen is shorter than in the original specimen. Thus, until the collision's end, the modified thin aluminum tube specimen provides better performance and absorption of impact energy.
Analysis of Ni2+ Metal Adsorption on Chitosan Membrane with Density Functional Theory (DFT) Method Muhammad Adrian Natsir; Zulkifli Zam Zam; Fadlan Muin; Sudir Umar
Techno: Jurnal Penelitian Vol 11, No 1 (2022): Techno Jurnal Penelitian
Publisher : Universitas Khairun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33387/tjp.v11i1.4182

Abstract

This study aims to modeling the membrane structure of chitosan containing nickel metal and determine the adsorption energy and energy gap of the chitosan molecular structure containing nickel metal. The molecular structure modeling was carried out using a computer using Avogadro software and analyzed with GaussView 6 software. The results of shape optimization using the Density Functional Theory (DFT) method with the basis set B3LYP/LanL2DZ were the total energy of the chitosan-Ni compound. The analysis revealed the interaction between the structure of chitosan and metal Ni. Determination of the structural model of chitosan and Ni metal shows a stable molecular geometry with an electronic energy value of 38826.90 eV in chitosan-Ni with a linear molecular geometry. Modeling the structure of chitosan with nickel metal shows the presence of bonds between nickel metal and chitosan in the inter glycosidic bonding region with a bond length of 1.92 for Ni-N and 1.81 for Ni-O. The adsorption energy of the chitosan structure with nickel is -18.236 eV. The energy gaps in the structure of chitosan-Ni, chitosan, and Ni are 0.10456, 0.23481, and 0.10213 eV.
The Design and Implementation E-Scaffolding Enhance Learning (ESEL) Using Web-based Simulation on Moment of Inertia Lia Laela Sarah; Yudi Ananto; Dona Octanary; Lissiana Nussifera
Techno: Jurnal Penelitian Vol 11, No 1 (2022): Techno Jurnal Penelitian
Publisher : Universitas Khairun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33387/tjp.v11i1.4191

Abstract

In this study, E-Scaffolding Enhance Learning (ESEL) using Web-based simulation has been designed and implemented. The scaffolding approach in this research is a conceptual scaffolding of the moment of inertia. Web-based simulation consists of 2D and 3D simulation. The 3D simulation was developed using unity software and 2D simulation was developed using scratch and articulate storyline software. All simulation was published as an Html file, and finally inserted into the website. The validation of the product was carried out by experts such as a physics lecturer and a physics teacher. The implementation phase was carried out through collaborative distance learning between one Senior High School in Bandung and one school in West Nusa Tenggara. The validation results show that ESEL using Web-based simulation on moment of inertia is deserved with an average score of 92% in the very good category. Nevertheless, there are several improvements still need to be made in terms of the appearance of the Web-based 3D simulation especially when it is accessed by phone cell. The appearance of the Web-based 3D simulation is still not responsive for smartphones. But based on the questionnaire result of students, ESEL using Web-based simulation on moment of inertia has a value 71% which means that ESEL has a good category of validation and is interesting for the students. ESEL using Web-based simulation also improves students’ activities in the distance learning of physics classroom.
Growth Performance of Pangasius sp Fed Different Types of Diets Formulated from Varieties Fish Meal Sources Khamsiah Ahmad; Aras Syazili; Surahman Surahman; Mutmainnah Mutmainnah
Techno: Jurnal Penelitian Vol 11, No 1 (2022): Techno Jurnal Penelitian
Publisher : Universitas Khairun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33387/tjp.v11i1.4111

Abstract

Pangasius sp is an introductory species that is widely distributed in freshwater regions in Indonesia since the 1990s and it was initiatively reared at the beginning of 2011 using a floating net cage in Lake Ngade, Ternate. Even though it has benefited economically, there is still a lack of information on its biological and ecological aspects. Growth and survival rate are two main factors that should be known to develop Pangasius aquaculture. The study aims to understand the growth and survival rate of Pangasius by mixing different fish meals into dietary. 120 Pangasius fingerlings were placed into 12 tanks. Diet was formulated using Pearson’s square method. Three different protein fish meal sources were mixed into feed formulation namely flying fish meal, Nile meal, and eel meal. Commercial feed was used as control. Filling Randomized Design (FRD) was applied with the experimental set-up of the treatments. The results show that feed stability in water ranges from 2'23" to 3'47" while feed durability ranges from 2'09" to 2'35". The survival rate of Pangasius is almost 100% except for treatment C. Growth rates vary among treatments which is the highest found in treatment A (16.42%) followed by treatment B (15.85%), D (15.57%), and C (7.00%) respectively. Nile fish meal is also significantly affected (P<0.05) by the Specific Growth Rate (SGR) of fish. Nutrition ingredients and water quality parameters are conducive to maintaining the fish's life. All in all, different fish meal sources in the formulated diet are significantly supporting Pangasius growth.
Effects of Nuclear Polyhedrosis Virus (NPV) on The Death of Spodoptera litura Larvae (Lepidoptera: Noctuidae) and its Comparison with Chemical Pesticide Agung Sih Kurnianto; Ana Miftahul Janah; Nur Laila Magvira; Ankardiansyah Pandu Pradana
Techno: Jurnal Penelitian Vol 11, No 1 (2022): Techno Jurnal Penelitian
Publisher : Universitas Khairun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33387/tjp.v11i1.3315

Abstract

Spodoptera litura larvae are polyphagous insects and have caused a lot of damage to various commodities. The application of Nuclear Polyhedrosis Virus (NPV) can be used as an alternative to control, other than by using chemical pesticides. This research was conducted to compare the mortality of S. litura with NPV treatment and compare them with chemical pesticides. NPV treatment with a concentration of 0.3% is used to soak the leaves to be used as larvae feed, as well as chemical pesticides the active ingredient Lambda-cyhalothrin (with a concentration of 0.05%). Observations were made at 2, 24, 48, and 76 hours after application. The parameters observed from the treatment included the percentage of mortality and morphological changes of larvae. Observation of the morphological changes of larvae was carried out by the parameters of slowing motion, discoloration, decaying, and severe shrinkage. Based on the results of the comparison, the percentage of mortality in the treatment of chemical pesticides is higher than the NPV. Death of 100% in Lambda-Cyhalothrin treatment was recorded in the first 2 (two) hours, while for NPV treatment is as much as 80%. The larvae with NPV treatment undergo a process of color change and the decomposition process is faster than the treatment of Lambda-cyhalothrin.
Earthquake Disaster Risk Analysis in South Morotai Tourism Area Risky Nuri Amelia; Marwis Aswan
TECHNO: JURNAL PENELITIAN Vol 11, No 2 (2022): TECHNO JURNAL PENELITIAN
Publisher : Universitas Khairun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33387/tjp.v11i2.5133

Abstract

Morotai is located in the subduction zone of the Philippine Sea Plate and has the potential to be a threat to earthquake disasters. Given that the Morotai region tourism area has the potential to be threatened by earthquakes, it is necessary to prepare a Disaster Risk Assessment (KRB) in the Tourism Area, especially in South Morotai. The purpose of the disaster risk analysis study in the tourism area is to identify potential hazards based on earthquake vulnerability, and prepare a disaster risk assessment in the South Morotai priority tourism area. The risk assessment research conducted uses earthquake hazard information with the maximum ground acceleration value on the surface (PGA) obtained from updated results that have been carried out by PusGEn. The earthquake disaster risk assessment resulting from the analysis of hazard, vulnerability and capacity is obtained in the form of a high disaster risk level. Areas with high disaster risk are Daruba Village (score 11.1) and Darame Village (13.9). However, in terms of the area at high risk, Daruba Village has a large area of 15.1 km2. A planning strategy is needed for the development of disaster resilient tourism destinations by analyzing the 6A factors, namely attractions, accessibility, amenities, available packages, activities, and ancillary services.
Study of Resistance on Orchids Induced Rhizoctonia to ORSV Based on Secondary Metabolite Analysis Mahfut Mahfut; Widi Aryani; Tundjung Tripeni Handayani; Sri Wahyuningsih
TECHNO: JURNAL PENELITIAN Vol 11, No 2 (2022): TECHNO JURNAL PENELITIAN
Publisher : Universitas Khairun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33387/tjp.v11i2.3044

Abstract

Dendrobium discolor and Phalaenopsis amabilis are in high demand because of their beautiful shape, color, texture, and flower arrangement. The current obstacle to orchid cultivation is infection with Odontoglossum ringspot virus (ORSV). One of the efficient ways to control the infection of this pathogen and does not cause an impact on the environment is to use Rhizoctonia mycorrhizae. Mycorrhizal relationship with plants will form induced resistance. Plants resulting from induced resistance will induce secondary metabolite, namely peroxidase enzymes. This type of secondary metabolites will prevent the growth and development of pathogens and plants become resistant to pathogenic infections. The purpose of this study was to determine differences in peroxidase enzyme activity and differences in resistance to P. amabilis and D. discolor after Rhizoctonia induction against ORSV infection. This research was carried out in several stages, namely plantlet preparation, mycorrhizal inoculation, mycorrhizal inoculation, and peroxidase enzyme activity analysis using a UV Vis spectrometer at a wavelength of 420 nm. The results showed that D. discolor had a higher peroxidase enzyme activity than P. amabilis. In the treatment application factor, the peroxidase enzyme activity was the highest in the Mycorrhizal Virus treatment compared to the Mycorrhizal and Virus treatments. This study showed that D. discolor was more resistant to ORSV infection than P. amabilis. and the application of Mycorrhizae proved to be successful in increasing the activity of the peroxidase enzyme as a response to plant protection against viral infections.
Analysis of Ca2+ and Fe2+ Ions in Ngade Water and Tolire Lake Water Ternate, North Maluku Fadlan Muin; Muhammad Amin; Saras Wati Banapon
TECHNO: JURNAL PENELITIAN Vol 11, No 2 (2022): TECHNO JURNAL PENELITIAN
Publisher : Universitas Khairun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33387/tjp.v11i2.5091

Abstract

This study aims to obtain optimal and valid conditions for the analysis of inorganic ions Ca2+ and heavy metal Fe2+ and the comparison between inorganic ions Ca2+ and heavy metal ions Fe2+ contained in the water of Lake Ngade and Lake Tolire, using ion chromatography and UV-Vis spectrophotometry. This type of research is experimental laboratory. Based on the results of the research, the concentrations obtained from Ca2+ ions and Ca2+ ions are for the highest concentration of Ca2+ ions in Lake Ngade water at 1.259 ppm, Big Tolire Lake water at 3.410 ppm and Small Tolire Lake water at 6.154 ppm. Meanwhile, the highest concentration of Fe2+ ions is in Lake Ngade water at 5.606 ppm, Big Tolire Lake water at 5.500 ppm, and Small Tolire Lake water at 5.379 ppm.

Page 11 of 17 | Total Record : 169

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